A general guide for troubleshooting a rice cooker is available on DoItYourself.com. For more specific information, consult the product manual that was packaged with the rice cooker or contact the manufacturer for assistance.
Before troubleshooting a rice cooker, unplug it from any power source, and then dismantle the rice cooker to check the heating element, the resistor and the switch contact areas. Clean or replace any damaged parts where necessary before putting the rice cooker back together again.
Visit the rice cooker manufacturer's website for more information to help troubleshoot a rice cooker. The manufacturer's website may supply product manuals and answers to frequently asked questions. It may also provide customer service support and sales of replacement parts.